EP0051899A1 - Vorrichtung zum automatischen Erkennen und Auswerten der Merkmale von Druckschriften - Google Patents
Vorrichtung zum automatischen Erkennen und Auswerten der Merkmale von Druckschriften Download PDFInfo
- Publication number
- EP0051899A1 EP0051899A1 EP81201245A EP81201245A EP0051899A1 EP 0051899 A1 EP0051899 A1 EP 0051899A1 EP 81201245 A EP81201245 A EP 81201245A EP 81201245 A EP81201245 A EP 81201245A EP 0051899 A1 EP0051899 A1 EP 0051899A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical system
- prints
- focussing
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 41
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 238000011896 sensitive detection Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/121—Apparatus characterised by sensor details
Definitions
- the invention relates to an apparatus for automatically detecting and evaluating one or more characteristics of prints by comparison of optically obtained data of a print to be tested with a standard print.
- An object of the present invention is an extension of the number of selection grades applied for the evaluation of prints.
- a further object of the invention is an optimal use of the light source needed for illuminating the prints to be tested.
- Another object of the invention is to improve the signal/noise ratio.
- Another object of the invention is to implement an optical calibration of the measurements being carried out without considerably delaying the evaluation process.
- an apparatus for automatically detecting and evaluating one or more characteristics of prints is characterized by a light source in a first focussing optical system, a reflector means forming the test field background, and a light sensitive detection means in a second focussing optical system, whereby said first focussing optical system and said second focussing optical system are directed to said test field having their optical axes set at equal, but opposite angles with the normal of the test field.
- print testing is arranged in a specular reflection configuration so that for example holes in a print, therefore spacial interruptions in the solid body of the substrate of the print can be easily detected using a rejection top limit by having the reflector means present.
- the apparatus according to the invention can incorporate the reflection of the portion of the plane carrying the prints to be tested in between two successive prints enabling a pseudo- continuing standardisation without loss of pace.
- the plane carrying the prints to be tested then could advantageously be the reflector means.
- a configuration is shown with a first optical system with axes AB and BC and a second optical system with axes CD, DE and EF.
- the axes BC and CD are set at equal but opposite angles of about 10 with the normal point C on the surface of a drum 25.
- This drum 25 is part of a conveyor means passing the prints to be tested through the apparatus and in particular across the position defined by point C.
- the drum 25 is rotating around a shaft 26 in the direction as indicated in the figure.
- Point C defines a line parallel to shaft 26 of drum 25, said parallel line crossing the drum surface. Scanning of a passing print 29 takes place along said line.
- a first optical system comprises a light source 1 having an astigmatic condensor system consisting of lenses 2, 3 and 4, a cylinder lens 5 joined with a Fresnel lens 6, and finally an optical element 7 operative as a concave mirror.
- the first optical system images the filament of light source 1 at the surface of drum 25 where position C is located.
- the second optical system along the axes CD, DE and EF comprises a lens system 9, mirrors 10 and 11 and an ocular 13.
- the second optical system images the narrow illuminated strip at position C on drum 25 onto a photoelectric converter element 14 equally being carried out linearly.
- the photoelectric converter element is a so-called solid-state line scanner, type RL 64A of Reticon Corporation.
- This converter element comprises 64 tightly packed photodiode elements in a single array. The diode-elements of such a converter element are read in sequence.
- a shutter 12 is arranged in the second optical system.
- a fixed lens and mirror means 15 and a hinged mirror means 16 enable to make observations with the converter element 14 of diffuse light reflection in position C.
- a second photoelectric converter means 21 can be put to use along axes EG and GH via a plane mi.rror 18 and a lens system 19, 20 with a stop slit, e.g. for detecting a print edge when passing along position C.
- the surface of drum 25 may be used as a reflector means to cause saturation of one or more of the diode elements in the photo- electric converter element 14 when the radiation intensity of lamp 1 and the transmission characteristics of the optical systems have been properly adjusted. This adjustment has to be done in such a manner that the presence of a print in position C at least when this print is a sound one, does not cause saturation of any diode element. Holes and dog-ears respectively in the tested print can be easily detected in this manner.
- the transmission of the optical systems and the photoelectric converter element have been selected such that the surface reflection value of drum 25 is within the: range of measurement of photoelectric converter element 14, this reflection value can be used as a reference for calibrating the complete apparatus in between testing two prints.
- a second drum 30 is shown which is part of the said conveyor means and feeds prints to drum 25, for example.
- the reflector means can have a special embodiment, viz. in the form of an optical element 17 as shown in detail in fig. 2.
- Optical element 17 comprises an elongated rectangular prism 27 and a piano convex cylinderlens 28 being arranged onto the prisma opposite the rectangle.
- Optical element 17 is mounted in such a way that it is directed according to the normal in point C onto the supporting face presented by drum 25 for prints to be tested, the area as illuminated by the first optical system being located in the focal plane of lens 28.
- light being focussed at position C is specularly reflected by reflector means 17 in the direction of axis CD of the second optical system.
- the embodiment as shown in fig. 1 comprises an additional mirror 23 which can reflect the light as focussed by the first optical system when in position 24 being shown in dotted lines to a reference surface 22 which can be a white standard, for example.
- the same mirror 23 in the position 24 can mirror the reference surface 22 into the second optical system so that the reference surface 22 can enable an absolute calibration of the apparatus.
- the reference surface 22 is arranged on the inside of a window pane 8 separating the space comprising the parts of the optical systems from the space in which the conveyor means 25, 30 are located.
- the apparatus as described above distinguished itself by its reproducibility, that is to say, a second test of a lot of prints in the said apparatus will produce substantially identical results as a first test. This is the case even without recalibration during the test of the lot. A recalibration in between lots of 10 000 prints for example by means of the white standard 22 and the movable mirror 23 in position 24 appears to be sufficient.
- the separation of the optical systems for illumination and detection respectively enables an optimal construction of both systems, each with respect to its aim, which results in a relatively weak light source as far as the illumination is concerned so that heat development is limited as much as possible.
- the spacial separation between the first optical system and the second optical system has as a result that indeed the heat sensitive parts of the electronic components, such as the photo- electric converter means 14 and 21 experience no substantial influence of the development of heat by lamp 1.
- the two optical systems are rather complicated, it appears that both systems are still very stable. It is profitable that the calibration of the apparatus takes place in substantially the same way as a measurement.
- one optical system has an even number of folds (C, D, E, F) and the other system has an odd number of folds (A, B, C) to space apart the light source and the photo-electric converter means as much as possible.
- the data processing apparatus in which the electric output signals delivered by the photo-electric converter element 14 and possibly by the photo-electric converter means 21, derives its timing control from the run of drum 25 which is therefor detected separately from the test of the prints being transferred on said drum.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Textile Engineering (AREA)
- Engineering & Computer Science (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Facsimile Scanning Arrangements (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Image Analysis (AREA)
- Image Processing (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81201245T ATE17531T1 (de) | 1980-11-07 | 1981-11-03 | Vorrichtung zum automatischen erkennen und auswerten der merkmale von druckschriften. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8006097 | 1980-11-07 | ||
NL8006097A NL8006097A (nl) | 1980-11-07 | 1980-11-07 | Inrichting voor het automatisch vaststellen en beoordelen van kwaliteiten van afdrukken. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0051899A1 true EP0051899A1 (de) | 1982-05-19 |
EP0051899B1 EP0051899B1 (de) | 1986-01-15 |
Family
ID=19836129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81201245A Expired EP0051899B1 (de) | 1980-11-07 | 1981-11-03 | Vorrichtung zum automatischen Erkennen und Auswerten der Merkmale von Druckschriften |
Country Status (6)
Country | Link |
---|---|
US (1) | US4555181A (de) |
EP (1) | EP0051899B1 (de) |
AT (1) | ATE17531T1 (de) |
CA (1) | CA1168467A (de) |
DE (1) | DE3173533D1 (de) |
NL (1) | NL8006097A (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6332338A (ja) * | 1986-07-26 | 1988-02-12 | Hitachi Ltd | 光学特性測定装置 |
US5632367A (en) * | 1995-01-23 | 1997-05-27 | Mars, Incorporated | Validation housing for a bill validator made by a two shot molding process |
US8725477B2 (en) * | 2008-04-10 | 2014-05-13 | Schlumberger Technology Corporation | Method to generate numerical pseudocores using borehole images, digital rock samples, and multi-point statistics |
CN101878434B (zh) | 2008-04-10 | 2014-05-07 | 普拉德研究及开发股份有限公司 | 用于表征被井眼穿过的地质构造的方法 |
US20110004447A1 (en) * | 2009-07-01 | 2011-01-06 | Schlumberger Technology Corporation | Method to build 3D digital models of porous media using transmitted laser scanning confocal mircoscopy and multi-point statistics |
US8311788B2 (en) | 2009-07-01 | 2012-11-13 | Schlumberger Technology Corporation | Method to quantify discrete pore shapes, volumes, and surface areas using confocal profilometry |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB880135A (en) * | 1959-02-24 | 1961-10-18 | Gen Electric Co Ltd | Improvements in or relating to the examination of sheet material |
US3474254A (en) * | 1968-02-26 | 1969-10-21 | Sick Erwin | Photoelectronic apparatus for scanning textile material |
US3476482A (en) * | 1967-09-27 | 1969-11-04 | Conrac Corp | Opacimeter for comparing light from different areas of sample sheet |
GB1213145A (en) * | 1966-11-29 | 1970-11-18 | Optique Soc Gen | Apparatus for the detection of flaws in a transparent material |
US3675016A (en) * | 1970-02-17 | 1972-07-04 | Eastman Kodak Co | Flying spot scanning |
FR2127767A5 (de) * | 1971-02-26 | 1972-10-13 | Gretag Ag | |
US3782543A (en) * | 1971-10-15 | 1974-01-01 | M Martelli | Document recognition systems |
US3917414A (en) * | 1973-10-11 | 1975-11-04 | Geisco Associates | Optical inspection system |
FR2443107A1 (fr) * | 1978-12-01 | 1980-06-27 | Radioelectrique Comp Ind | Procede de controle de l'etat physique d'un document imprime et installation pour la mise en oeuvre du procede |
EP0014894A1 (de) * | 1979-02-06 | 1980-09-03 | Erwin Sick GmbH Optik-Elektronik | Vorrichtung zum Überwachen von Fehlern in durchscheinendem Bandmaterial |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2810316A (en) * | 1954-09-24 | 1957-10-22 | Goodyear Tire & Rubber | Width measuring device |
US3013467A (en) * | 1957-11-07 | 1961-12-19 | Minsky Marvin | Microscopy apparatus |
US3206606A (en) * | 1961-07-20 | 1965-09-14 | Eastman Kodak Co | Photosensitive inspection method and apparatus |
DE1473746A1 (de) * | 1964-06-15 | 1969-01-09 | Eastman Kodak Co | Vorrichtung zum photoelektrischen Abtasten eines gefuehrten Bandes |
US3453043A (en) * | 1967-02-17 | 1969-07-01 | Fma Inc | Image rotating device |
US3628872A (en) * | 1969-11-06 | 1971-12-21 | Baxter Laboratories Inc | Spectrophotometric test apparatus and method employing retroflective means |
DE2001049B2 (de) * | 1970-01-12 | 1972-03-30 | Fa. Erwin Sick, 7808 Waldkirch | Photoelektronische anordnung zur messung der remission |
US3867030A (en) * | 1970-06-09 | 1975-02-18 | Atsuyuki Tanaka | Film control system by picture frame edge signals of a film |
DE2433683C3 (de) * | 1974-07-12 | 1979-02-22 | Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch | Vorrichtung zur Überwachung einer Materialbahn auf Fehlstellen |
NL7410463A (en) * | 1974-08-05 | 1976-02-09 | Tno | Document recognition system with relief of characteristic patter - has pick ups for modulated monochromatic light beam one along normal other at angle |
IT1067383B (it) * | 1976-07-20 | 1985-03-16 | Prodotti Ind Italia S R L | Procedimento ed apparecchiatura per il riconoscimento automatico di budni sconto e simili mediante comparazione elettronica |
DE2831836A1 (de) * | 1978-07-20 | 1980-02-07 | Agfa Gevaert Ag | Vorrichtung zur vorpruefung von kopiervorlagen |
US4197584A (en) * | 1978-10-23 | 1980-04-08 | The Perkin-Elmer Corporation | Optical inspection system for printing flaw detection |
-
1980
- 1980-11-07 NL NL8006097A patent/NL8006097A/nl not_active Application Discontinuation
-
1981
- 1981-10-23 US US06/314,292 patent/US4555181A/en not_active Expired - Fee Related
- 1981-11-03 AT AT81201245T patent/ATE17531T1/de not_active IP Right Cessation
- 1981-11-03 CA CA000389271A patent/CA1168467A/en not_active Expired
- 1981-11-03 DE DE8181201245T patent/DE3173533D1/de not_active Expired
- 1981-11-03 EP EP81201245A patent/EP0051899B1/de not_active Expired
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB880135A (en) * | 1959-02-24 | 1961-10-18 | Gen Electric Co Ltd | Improvements in or relating to the examination of sheet material |
GB1213145A (en) * | 1966-11-29 | 1970-11-18 | Optique Soc Gen | Apparatus for the detection of flaws in a transparent material |
US3476482A (en) * | 1967-09-27 | 1969-11-04 | Conrac Corp | Opacimeter for comparing light from different areas of sample sheet |
US3474254A (en) * | 1968-02-26 | 1969-10-21 | Sick Erwin | Photoelectronic apparatus for scanning textile material |
US3675016A (en) * | 1970-02-17 | 1972-07-04 | Eastman Kodak Co | Flying spot scanning |
FR2127767A5 (de) * | 1971-02-26 | 1972-10-13 | Gretag Ag | |
US3782543A (en) * | 1971-10-15 | 1974-01-01 | M Martelli | Document recognition systems |
US3917414A (en) * | 1973-10-11 | 1975-11-04 | Geisco Associates | Optical inspection system |
FR2443107A1 (fr) * | 1978-12-01 | 1980-06-27 | Radioelectrique Comp Ind | Procede de controle de l'etat physique d'un document imprime et installation pour la mise en oeuvre du procede |
EP0014894A1 (de) * | 1979-02-06 | 1980-09-03 | Erwin Sick GmbH Optik-Elektronik | Vorrichtung zum Überwachen von Fehlern in durchscheinendem Bandmaterial |
Also Published As
Publication number | Publication date |
---|---|
EP0051899B1 (de) | 1986-01-15 |
CA1168467A (en) | 1984-06-05 |
US4555181A (en) | 1985-11-26 |
DE3173533D1 (en) | 1986-02-27 |
NL8006097A (nl) | 1982-06-01 |
ATE17531T1 (de) | 1986-02-15 |
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